EP 1191726 A1 20020327 - A method of transmitting data symbols in a digital teletransmission network; a digital teletransmission network and network elements therefor
Title (en)
A method of transmitting data symbols in a digital teletransmission network; a digital teletransmission network and network elements therefor
Title (de)
Verfahren zur Übertragung von Datensymbolen in einem digitalen Fernübtragungsnetzwerk; ein digitales Fernübertragungsnetzwerk und Netzwerkelemente hierzu
Title (fr)
Procédé de transmission de symboles de données dans un réseau de télétransmission numérique; un réseau de télétransmission numérique et ses éléments
Publication
Application
Priority
EP 00610099 A 20000926
Abstract (en)
A method of transmitting data symbols (RDAT; RDAT1; RDAT2) between network elements in a digital teletransmission network (1) comprises the steps of transmitting the data symbols from a first network element (2) to a second network element (3) by modulating a signal having a first wavelength ( lambda DAT; lambda DAT1; lambda DAT2) ; receiving in the second network element the data symbols by demodulation of the signal having a first wavelength, calculating a number of extra symbols (RFEC) from the data symbols, transmitting also the extra symbols; receiving in the second network element the extra symbols; and utilizing them for error correction of the received data symbols. The extra symbols are transmitted from the first network element by modulating a signal having a second wavelength ( lambda FEC) different from the first wavelength. By using a separate wavelength for the extra symbols the data symbols can be transmitted unaffected according to the normal standards. <IMAGE>
IPC 1-7
IPC 8 full level
H04B 10/00 (2013.01); H04B 10/02 (2006.01); H04B 10/077 (2013.01); H04B 10/08 (2006.01); H04J 14/02 (2006.01); H04L 1/00 (2006.01); H04L 1/04 (2006.01)
CPC (source: EP)
H04B 10/0775 (2013.01); H04J 14/0226 (2013.01); H04J 14/0246 (2013.01); H04J 14/0279 (2013.01); H04L 1/004 (2013.01); H04L 1/04 (2013.01); H04B 2210/072 (2013.01); H04B 2210/078 (2013.01)
Citation (search report)
- [X] SHOU-KUO SHAO ET AL: "WDM CODING FOR HIGH-CAPACITY LIGHTWAVE SYSTEMS", JOURNAL OF LIGHTWAVE TECHNOLOGY,US,IEEE. NEW YORK, vol. 12, no. 1, 1994 - January 1994 (1994-01-01), pages 137 - 148, XP000460016, ISSN: 0733-8724
- [X] MING-SENG KAO ET AL: "WDM CODING SYSTEM WITH SINGLE PARITY-CHECK CHANNEL", JOURNAL OF LIGHTWAVE TECHNOLOGY,US,IEEE. NEW YORK, vol. 12, no. 10, 1 October 1994 (1994-10-01), pages 1827 - 1834, XP000469530, ISSN: 0733-8724
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
DOCDB simple family (application)
EP 00610099 A 20000926